Bobbin-holder for sewing-machine shuttles.



PATENTED JUNE 2, 1903.

. H. A. BATES. BOBBIIN HOLDER FOR SEWING MACHINE SHUTTLES.

APPLICATION TILED OCT. 1, 1907.

r": NORRIS ":flns cm, wAsl-lmarou. n. c.

' bobbin bears.

- dotted line :0, ac, Fig; 1.

'my invention.

5) in a normal or initial position.

UNITE HENRY A. BATES, OF MIDDLETOWN CONNECTICUT.

BOBBIN-HOLDER FOR SEWING-MACHINE SHUTTLES.

T 0 all whom it may concern:

Be it known that I, HENRY A. BATES, a citizen of the United States,residing at Mid dletown, in the county of Middlesex and State ofConnecticut, have invented an Tmprovement in Bobbin-Holders for SewingMachine Shuttles, of which the following is a specification.

My invention relates to sewing machine shuttles and particularly to thebobbin case and means for locating therein the thread bobbin, and mypresent invention is an improvement upon the device shown and describedin Letters Patent granted to me June th, 1897, No. 584572, and theobject of mypresent invention is to keep the thread bobbin well withinthe bobbin case.

In carrying out my invention, the bobbin case holder is formed with acentral pin over which the tubular arbor of the bobbin case withitsthread bobbin is passed in connecting the parts. An annular member isslipped over the pin of the bobbin case holder or hook and is forced toplace around the base of said pin and this member is of a diameter equalto or greater than that of the paper tube center of the thread. bobbin;the function of this member is to come against the thread bobbin and itstubular center so as to keep the thread bobbin well within the bobbin.case. I prefer that this member be in the form of a disk of slightlyless diameter than the internal diameterof the bobbin case, so that whenthe parts are connected, this disk extends within this case and the twoparts completely envelop the thread bobbin,

said bobbin case being of course constructed with the usual thread slotproviding an exit for the thread and also with the usual tension deviceorspring for applying tension to the thread.

In the drawing, Figure 1 is a side elevation of a well known style ofbobbin holder. Fig. 2 is a cross section of the same on about the Fig. 3is a plan of the disk member adapted to fit within the bobbin case. Fig.4 is a cross section similar to the cross section Fig. 2, showing a formof Fig. 5 is an elevation of a spring employed within and at the base ofthe bobbin case and against which the thread Fig. 6 is an end elevationof a collar employed around the central sleeve of the bobbin case forholding the spring (Fig. Fig. 7 is an elevation of the "form of springshown in Specification of Letters Patent.

Application filed October 1, 1907.

Patented .Tune 2, 1908.

Serial No. 395,325.

my patent and Fig. 8 is an edge view of the same.

The bobbin case holder a is of usual and ordinary character; it issubstantially circular and is provided with a projection or hook 2 bywhich said holder is prevented from rotating with a hook device thatrevolves and carries the loop of needle thread around the holder. Thisbobbin case holder a is constructed with a central pin 1) let into thecentral shouldered base I) of said holder, the shouldered base beingadvantageously of slightly greater diameter than the pin and the bearingsurface of which is in a plane parallel with that of the thread bobbin.The bobbin case a is circular and also of usual and well known characteradvantageously provided with a tubular central arbor c of an interiordiameter slightly greater than that of the pin 5 so as to set over saidpin, said tubular central arbor a being of such a length that the freeend thereof bears down upon the surface of the shouldered baseb of thebobbin case holder. This bobbin case is to be slotted for the thread ofthe thread bobbin (1 as usual and provided with a spring 0 as is usuallythe case, beneath which this thread passes to produce a tension orfrictionv upon the thread. These thread bobbins are Wound upon a tubularcenter 01 preferably a paper tube which interiorly is of slightlygreater diameter than the over all diameter of the tubular arbor 0 sothat the said thread bobbin drops readily over the said tubular arbor.

Within the bobbin case and surrounding its tubular arbor c is a springwhich bears up on the inner surface of the bobbin of thread to preventthe same moving endwise in either direction along the tubular arbor asthe result of looseness, as I have found this to be detrimental. Thisspring compensates for the lack of absolute uniformity in the threadbobbins and prevents this looseness. This spring is shown in Figs. 4 and5 of the form shown in Letters Patent No. 515187, or No. 522002, or No.584572, granted to me, and comprises a circular disk centrallyperforated and with oppositely extending points which points bear uponthe inner surface of the bobbin case; a collar 3 is forced down over thetubular arbor 0 so as to prevent the spring 6 coming off the same andbeing lost. The spring 6 shown in Figs. 2, 7 and 8, is of the form shownin Letters Patent No. 651155, granted to me June 5, 1900, and consistsof a central disk with prongs to engage around the tubular arbor and anouter ring connected thereto byradial arms. Both forms of spring performthe same function.

The drawing illustrates two forms of my invention, the object of whichis to keep the thread bobbin well within the bobbin case, the preferredform of the invention being shown in Figs. 2 and 3, in which frepresents a disk of metal with a central flange or collar f adapted tobe passed over the pin Z) and forced down over its shouldered base Z)and held frictionally in position. This disk is of a diameter whichadapts it not only to come against the end of the thread bobbin or itstubular center so as to keep the thread bobbin well within the bobbincase, but it is of such a diameter as will provide freely for it beingreceived within the bobbin case as shown in Fig. 2, whereby it performsthe additional function of closing the bobbin case so as to completelyenvelop the thread bobbin and keep out dust, oil and lint.

In the form of my invention shown in Fig. 4, the primary object ofkeeping the thread bobbin well within the bobbin case is performed by awasher 4 which is adapted to slip freely over the pin Z) and be forcedto place over the shouldered base I), the said washer 4 being of adiameter that is equal to or greater than the extreme diameter of thepaper tube center of the thread bobbin, so that its action is to pressthe thread bobbin into the bobbin case against the tendency of thespring 2 to expel the bobbin from the case, consequently the bobbin isheld within the case, especially in the position of use, so

that the maximum entirely protected.

While I have shown and described and prefer to employ the disk I do notlimit my invention thereto, as the main function performed thereby isalso performed by the washer 4 shown in Fig. 4.

I claim as my invention:

1. The combination with the circular bobbin case, a central tubulararbor formed therewith and a spring adapted to fit over said tubulararbor and bear against the inner surface of the bobbin case,-of a bobbincase holder circular and of usual character, a pin occupying a centralposition with refer ence to the bobbin case holder, and a shoulderedbase at the union of the pin therewith, with a bearingisurface in aplane substantially parallel with that of the thread bobbin, which baseis of a diameter greater than the pin and substantially equal to thediameter of the paper tube center of the thread bobbin performing thefunction of keeping the thread bobbin well within the bobbin case.

2. The combination with the circular bob bin case adapted to receive athread bobbin, a central tubular arbor formed therewith portion of itsthread is and a spring adapted to fit over said tubular arbor and bearagainst the inner surface of the bobbin case, of a bobbin case holdercircular and of usual character, a central pin formed therewith and overwhich the tubular arbor of the bobbin case is adapted to pass inconnecting the parts, and a device located at the opposite side of thebobbin case to that occupied by said spring and adapted to be slippedover the pin of the bobbin case holder and to be forced to place aroundthe base of the same, and which device is of a diameter substantiallyequal to that of the paper tube center of the thread bobbin and which isadapted to keep the thread bobbin well within the bobbin case.

3. The combination with the circular bobbin case and a central tubulararbor formed therewith, a spring adapted to fit over said tubular arborand to bear against the inner surface of the bobbin case, of a bobbincase holder, circular and of usual character, a pin occupying a centralposition with reference to the bobbin case holder and a shouldered baseof the latter to which the pin is secured and which base is of slightlygreater diameter than that of the pin with a bearing surface in a planesubstantially parallel with that of the thread bobbin, and an annularmember adapted to be slipped over the pin and to be forced to place andfrictionally held to the shouldered base and which annular member is ofadiameter substantially equal to that of the paper tube center of thethread bobbin, said annular member performing the function of keepingthe thread bobbin well within the bobbin case.

4:. The combination with the bobbin case and a central tubular arborformed therewith, a spring adapted to fit over said arbor and to bearagainst the inner surface of the bobbin case and a coacting collarsurrounding said tubular arbor, of a bobbin case holder circular and ofusual character, a pin occupying a suitable position with. reference tothe bobbin case holder and a shouldered base of the latter to which thepin is secured and which base is of slightly greater diameter than thatof the pin, and an annular member in the form of a central perforatedflanged disk f adapted to be passed over the central pin of the bobbincase holder and to be forced down over the shouldered base I) and saiddisk being of a diameter slightly less than the internal diameter of thebobbin case 0 so as with the bobbin case, to completely envelop thethread bobbin as well as to keep the same well within the bobbin case.

Signed by me this 21st day of August 1907.

HENRY A. BATES.

Witnesses:

GEo. F. PINCKNEY, BERTHA M. ALLEN.

